Java Programming

Hi,

I'd like to make sure that only one instance of my Java application can be run and I've done some search around. The recommended approach seems to be using ServerSocket that occupies a certain port.

On the other hand I've seen that JConsole could display the names of all Java processes that are running. This is perhaps another approach to the issue? JConsole is said to be a pure Java tool, so I was wondering how this is implemented. I've googled a bit but still could not find out how. Could someone please give me a hint?

Thanks a lot!